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Oduvanchick [21]
3 years ago
13

What do we call a substance in which two or more elements are chemically bonded

Physics
2 answers:
Goryan [66]3 years ago
8 0

Answer:

A compound

Explanation:

A compound is a substance formed when two or more elements are chemically joined

faust18 [17]3 years ago
8 0

Answer:

Compound

Explanation:

A compound is a substance derived from the chemical combination of two or more elements

e.g Water ;

= H_2O\\Hydrogen\:and\:Oxygen

Salt ;

NaCl\\Sodium\:and\: Chlorine

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How long does a car (1000 kg) have a speed of 30 m/s from a rest if the engine power is 10kw
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Answer: 90.1 s

Explanation:

Use equation for power:

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Use eqation for force:

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F---force

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m=1000kg

P=10000W

---------------------------

P=FV

F=P/V

F=10000W/30m/s

F=333.33N

Use equation for force to find accelartaion.

F=ma

a=F/m

a=333.33N/1000kg

a=0.333 m/s²

Use equation for accelaration to find out time:

a=(V-Vs)/t

t=(V-Vs)/a

t=(30m/s)/(0.333m/s²)

t=90.09 s≈90.1 s

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Explanation:

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